My worst bug is hosting.
I can successfully start up a server, but when someone joins, we both crash, but I get the worst of it.
First, the sound plays and displays theconnection message. (Freezes) Next It stays like that for 5 minutes - plenty of time for the guest to re-connect and be able to join a game again. Then the screen goes black for 5-10 minutes and will not respond to any commands. Filally it will return to the Desktop with no windows up. The strangest part: I am still connected to the internet at usual strength.
Wierd, huh?